1255815793690 has 32 divisors (see below), whose sum is σ = 2292550677504. Its totient is φ = 495198439680.

The previous prime is 1255815793681. The next prime is 1255815793697. The reversal of 1255815793690 is 963975185521.

It is a super-2 number, since 2×1255815793690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255815793697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6930322 + ... + 7109218.

It is an arithmetic number, because the mean of its divisors is an integer number (71642208672).

Almost surely, 2^{1255815793690} is an apocalyptic number.

1255815793690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1255815793690 is a deficient number, since it is larger than the sum of its proper divisors (1036734883814).

1255815793690 is a wasteful number, since it uses less digits than its factorization.

1255815793690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188862.

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 1255815793690 in words is "one trillion, two hundred fifty-five billion, eight hundred fifteen million, seven hundred ninety-three thousand, six hundred ninety".